Cisco Systems 3560 사용자 설명서

without arguments. To disable IPv6 processing on an interface that has not been explicitly configured 
with an IPv6 address, use the no ipv6 enable interface configuration command. To globally disable IPv6 
routing, use the no ipv6 unicast-routing global configuration command.

This example shows how to enable IPv6 with both a link-local address and a global address based on the 
IPv6 prefix 2001:0DB8:c18:1::/64. The EUI-64 interface ID is used in the low-order 64 bits of both 
addresses. Output from the show ipv6 interface EXEC command shows how the interface ID 
(20B:46FF:FE2F:D940) is appended to the link-local prefix FE80::/64 of the interface.

Switch(config)# sdm prefer dual-ipv4-and-ipv6 default 

Switch(config)# ipv6 unicast-routing

Switch(config)# interface fastethernet0/11

Switch(config-if)# no switchport

Switch(config-if)# ipv6 address 2001:0DB8:c18:1::/64 eui 64

Switch(config-if)# end

Switch# show ipv6 interface fastethernet0/11

FastEthernet0/11 is up, line protocol is up

  IPv6 is enabled, link-local address is FE80::20B:46FF:FE2F:D940

  Global unicast address(es):

  2001:0DB8:c18:1:20B:46FF:FE2F:D940, subnet is 2001:0DB8:c18:1::/64 [EUI]

  Joined group address(es):

    FF02::1

    FF02::2

    FF02::1:FF2F:D940

  MTU is 1500 bytes

  ICMP error messages limited to one every 100 milliseconds

  ICMP redirects are enabled

  ND DAD is enabled, number of DAD attempts: 1

  ND reachable time is 30000 milliseconds

  ND advertised reachable time is 0 milliseconds

  ND advertised retransmit interval is 0 milliseconds

  ND router advertisements are sent every 200 seconds

  ND router advertisements live for 1800 seconds

  Hosts use stateless autoconfig for addresses.

Router advertisement messages are sent with the default router preference (DRP) configured by the 
ipv6 nd router-preference interface configuration command. If no DRP is configured, RAs are sent 
with a medium preference.

A DRP is useful when two routers on a link might provide equivalent, but not equal-cost routing, and 
policy might dictate that hosts should prefer one of the routers.

Beginning in privileged EXEC mode, follow these steps to configure a DRP for a router on an interface.

Enter global configuration mode.

interface interface-id

Enter interface configuration mode, and enter the Layer 3 interface on 
which you want to specify the DRP.

ipv6 nd router-preference {high | 
medium | low}

Specify a DRP for the router on the switch interface.

Return to privileged EXEC mode.

Verify the configuration.

(Optional) Save your entries in the configuration file.